User:Shubinator/DYKcheck.js

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	// ***************************************************************** //
	//                          DYKcheck tool                            //
	//                           Version 1.1                             //
	// For quick installation, add                                       //
	// importScript('User:Shubinator/DYKcheck.js');                      //
	// to your vector.js                                                 //
	// See [[User:Shubinator/DYKcheck]] for more info, including         //
	// configurable options and how to use the tool without installation //
	// or logging in.                                                    //
	// First version written by Shubinator in February 2009              //
	// ***************************************************************** //

mw.loader.using(['mediawiki.api', 'mediawiki.util'], function () {
"use strict";

var onTTDYK, nextSection, urlJump, sections, currentTitle, partsProcessing,
	articleTitles, dates, nom5x;

// Configurable options
var
	dateFormat = window.dateFormat,
	unlock = window.unlock,
	hookLengthYellow = window.hookLengthYellow || 200,
	hookLengthRed = window.hookLengthRed || 220,
	check5xNoms = window.check5xNoms || "ifnom5x",
	fixedSidebar = window.fixedSidebar || "onttydk";

var mwConfig = mw.config.get([
	"wgAction",
	"wgTitle",
	"wgPageName",
	"wgUserName",
	"wgNamespaceNumber",
	"skin"
]);

var api = new mw.Api();

// Polyfill String.prototype.includes so that we don't have to write "!== -1" all over
// the codebase.
if (!String.prototype.includes) {
  String.prototype.includes = function() {
    return String.prototype.indexOf.apply(this, arguments) !== -1;
  };
}

function escapeHtml(s) {
	// Use the browser's built-in ability to escape HTML.
	var div = document.createElement('div');
	div.appendChild(document.createTextNode(s));
	return div.innerHTML;
}

function scanArticle(title, output, html) {
	// the meat of the DYKcheck tool
	// calculates prose size of the given html
	// checks for inline citations and stub templates in the given html
	// passes info to checkTalk(), getFirstRevision(), checkMove(), and checkExpansion()
	
	if (!onTTDYK || (check5xNoms === "always") || (check5xNoms === "ifnom5x" && nom5x)) {
		partsProcessing = new Array(4);
	} else {
		partsProcessing = new Array(3);
	}
	dates = new Array(4);

	var proseDisp = document.createElement("li");
	proseDisp.id = "dyk-prose";
	output.appendChild(proseDisp);

	// calculate prose size
	var prose = calculateProse(html, true);
	var pList = html.getElementsByTagName("p");
	var word_count = 0;
	for (var iPara = 0;iPara < pList.length; iPara++) {
		var para = pList[iPara];
		if (para.parentNode.parentNode === html || para.parentNode.parentNode.parentNode.id === getBodyId()) {
			word_count += para.innerHTML.replace(/(<([^>]+)>)/ig,"").split(' ').length;
		}
	}
	proseDisp.innerHTML='<b>Prose size (text only): </b>' + escapeHtml(prose) + '&nbsp;characters (' +
			escapeHtml(word_count) + ' words) "readable prose size"';
	if (prose < 1500) {
		proseDisp.style.cssText = "background-color:pink";
	}
	
	// check for inline citations
	if (!html.innerHTML.includes('id="cite_ref-') && !html.innerHTML.includes('id=cite_ref-')) {
		var noref = document.createElement("li");
		noref.id = "no-ref";
		output.appendChild(noref);
		noref.innerHTML = 'No inline citations';
		noref.style.cssText = "background-color:pink";
	}
	
	// check if article is stub or if it has appeared in DYK or ITN
	if (html.innerHTML.includes('id="stub"') || html.innerHTML.includes('id=stub') || 
			html.innerHTML.includes('metadata plainlinks stub')) {
		var stubAlert = document.createElement("li");
		stubAlert.id = "stub-alert";
		output.appendChild(stubAlert);
		stubAlert.innerHTML = 'Article is classified as a stub';
		stubAlert.style.cssText = "background-color:yellow";
	}
	checkTalk(title, output); //check talk page
	
	// check for various tags
	var alertColor = "yellow";
	var imageList = new Array("Text_document_with_red_question_mark.svg", 
			"Question book-new.svg", "Ambox content.png", "Ambox style.png", 
			"Imbox style.png", "Copyright-problem.svg", "Copyright-problem paste.svg", 
			"Ambox globe content.svg", "Unbalanced scales.svg", "Ambox scales.svg", 
			"Ambox_contradict.svg", "Ambox warning orange.svg", "Acap.svg");
	var tagList = new Array("unverified content", "insufficient citations", "dispute", "cleanup", "cleanup",
			"copyright violations", "copyright violations", "globalization", "neutrality", 
			"neutrality", "contradiction", "dispute", "copyedit");
	var tagsFound = false;
	var tagAlert = document.createElement("li");
	if (html.innerHTML.includes("This article is being considered for deletion in accordance with Wikipedia's")) {
		tagsFound = true;
		var afdIndex = html.innerHTML.indexOf('title="Wikipedia:Articles for deletion/') + 7;
		var afdLink = html.innerHTML.substring(afdIndex, html.innerHTML.indexOf('"', afdIndex));
		var afdBoldTag = document.createElement("b");
		var afdLinkTag = document.createElement("a");
		afdLinkTag.setAttribute("href", "//en.wikipedia.org/wiki/" + afdLink);
		afdLinkTag.appendChild(document.createTextNode("nominated for deletion"));
		afdBoldTag.appendChild(afdLinkTag);
		tagAlert.appendChild(document.createTextNode("Article has been "));
		tagAlert.appendChild(afdBoldTag);
		tagAlert.appendChild(document.createTextNode(". "));
		alertColor = "pink";			
	} else if ((html.innerHTML.toLowerCase().includes('<table class="plainlinks ombox ombox-speedy"')) || 
			(html.innerHTML.toLowerCase().includes('<table class="plainlinks ambox ambox-speedy"')) || 
			(html.innerHTML.toLowerCase().includes('<table class="metadata plainlinks ombox ombox-speedy"')) ||
			(html.innerHTML.toLowerCase().includes('<table class="metadata plainlinks ambox ambox-speedy"'))) {
		tagsFound = true;
		tagAlert.appendChild("Article has been <b>tagged for speedy deletion</b>. ");
		alertColor = "pink";
	}
	for (var iImage = 0; iImage < imageList.length; iImage++) {
		if (html.innerHTML.includes(imageList[iImage])) {
			tagsFound = true;
			tagAlert.appendChild(document.createTextNode("Article has a "));
			tagAlert.appendChild(document.createTextNode(tagList[iImage]));
			tagAlert.appendChild(document.createTextNode(" tag. "));
		}
	}
	if (tagsFound) {
		tagAlert.id = "tag-alert";
		tagAlert.style["background-color"] = alertColor;
		output.appendChild(tagAlert);
	}
		
	// find creator of article and date
	getFirstRevision(title, output);
	
	// check if the article has been moved from userspace within last 100 edits
	if (mwConfig.wgNamespaceNumber !== 2) {
		checkMove(title, output);
	} else {
		partsProcessing[2] = true;
	}
	
	// check for expansion start date, assuming now expanded to 5x (last 500 edits)
	if (!onTTDYK || (check5xNoms === "always") || (check5xNoms === "ifnom5x" && nom5x)) {
		checkExpansion(title, output, prose);
	}
}

function checkDocument() {
	// prepares for scan and passes info to scanArticle()
	onTTDYK = false;
	if (document.getElementById("dyk-stats-0")) {
		clearStats();
	} else {
		var output = document.createElement("ul");
		output.id = "dyk-stats-0";
		
		var body = getBody();
		var dummy = body.getElementsByTagName("div")[0];
		if (dummy.nextSibling && dummy.nextSibling.id === 'siteNotice') { // if siteNotice is below siteSub
			dummy = dummy.nextSibling;
		} else if (dummy.nextSibling.nextSibling && dummy.nextSibling.nextSibling.id === 'siteNotice') {
			dummy = dummy.nextSibling.nextSibling;
		}
		dummy.parentNode.insertBefore(output, dummy.nextSibling);
		createHeaderAndProcessing(output);
		currentTitle = 0;
		var title = mwConfig.wgTitle;
		if (mwConfig.wgNamespaceNumber === 2) {
			title = "User:" + title;
		}
		scanArticle(title, output, body);
	}
}

function checkTTDYK() {
	// finds the current nomination
	// can jump to a section if it shows up in the URL
	// (i.e. http://en.wikipedia.org/wiki/T:TDYK#Older_nominations)
	// prepares for scan and passes info to checkHooks() and scanArticle() (through pit stop)

	onTTDYK = true;
	if (!sections) {
		sections = document.getElementsByTagName("h4");
		nextSection = getFirstNom();
	}
	// Jumping code
	if (window.location.hash) {
		var sectionAt = window.location.hash;
		if (sectionAt !== urlJump) {
			var jump = document.getElementById(sectionAt.substring(1, sectionAt.length));
			var next = jump.parentNode;
			while (next.nodeName.toLowerCase() !== "h4") {
				next = next.nextSibling;
			}
			for (var iSection = 0; iSection < sections.length; iSection++) {
				if (sections[iSection] === next) {
					nextSection = iSection;
					urlJump = sectionAt;
					break;
				}
			}
		}
	}
	
	if (nextSection === sections.length) {
		alert("Reached end of nominations; looping to beginning");
		nextSection = getFirstNom();
	}
	if (document.getElementById("dyk-stats-0")) {
		clearStats();
	}
	var firstOutput = document.createElement("ul");
	firstOutput.id = "dyk-stats-0";
	sections[nextSection].parentNode.insertBefore(firstOutput, sections[nextSection]);
	var hook = checkHooks(firstOutput);
	if (!hook) {
		var hookErrorDisp = document.createElement("div");
		hookErrorDisp.id = "error-disp";
		hookErrorDisp.style.cssText = 'color:red; font-weight:bold;';
		hookErrorDisp.innerHTML = 'Error: Hook is not formatted correctly';
		firstOutput.parentNode.insertBefore(hookErrorDisp, firstOutput);
		nextSection++;
		return;
	}
	createHeaderAndProcessing(document.getElementById("dyk-stats-0"));
	var tempHolder = document.createElement("div");
	tempHolder.id = "temp-holder";
	tempHolder.innerHTML = hook;
	var bolded = tempHolder.getElementsByTagName("b");
	var articleTitlesTemp = new Array(bolded.length);
	var titlesCounter = 0;
	for (var iBolded = 0; iBolded < bolded.length; iBolded++) {
		var links = bolded[iBolded].getElementsByTagName("a");
		if (links.length > 0) {
			for (var iLink = 0; iLink < links.length; iLink++) {
				var linkTitle = links[iLink].getAttribute("title");
				if (!linkTitle) linkTitle = links[iLink].innerHTML; // links that aren't piped
				articleTitlesTemp[titlesCounter] = linkTitle;
				titlesCounter++;
			}
		} else {
			var pointer = bolded[iBolded];
			while (pointer !== tempHolder) {
				if (pointer.nodeName.toLowerCase() === "a") {
					var pointerTitle = pointer.getAttribute("title");
					if (!pointerTitle) pointerTitle = pointer.innerHTML; // links that aren't piped
					articleTitlesTemp[titlesCounter] = pointerTitle;
					titlesCounter++;
				}
				pointer = pointer.parentNode;
			}
		}
	}
	currentTitle = 0;
	articleTitles = new Array(titlesCounter);
	var hookOutput = document.getElementById("hook-container");
	for (var i = 0; i < titlesCounter; i++) {
		var output;
		if (i === 0) {
			output = firstOutput;
		} else {
			output = document.createElement("ul");
			output.id = "dyk-stats-" + i;
			hookOutput.parentNode.insertBefore(output, hookOutput);
		}
		var articleDisp = document.createElement("li");
		articleDisp.id = "article-title" + i;
		output.appendChild(articleDisp);
		articleDisp.innerHTML = '<b>Article ' + escapeHtml(i+1) + ':</b> ' + escapeHtml(articleTitlesTemp[i]);
		articleTitles[i] = articleTitlesTemp[i];
	}
	if (titlesCounter === 1) {
		document.getElementById("article-title0").innerHTML = '<b>Article:</b> ' + escapeHtml(articleTitles[0]);
	} else if (titlesCounter === 0) {
		if (document.getElementById("dyk-processing")) {
			var processing = document.getElementById("dyk-processing");
			processing.parentNode.removeChild(processing);
		}
		var boldErrorDisp = document.createElement("div");
		boldErrorDisp.id = "error-disp";
		boldErrorDisp.style.cssText = 'color:red; font-weight:bold;';
		boldErrorDisp.innerHTML = document.createTextNode('Error: The nominated article must appear in bold');
		sections[nextSection].parentNode.insertBefore(boldErrorDisp, firstOutput);
		nextSection++;
		return;
	}
	nextSection++;
	checkTitle(articleTitles[0], firstOutput, 0);
}

function checkHooks(output) {
	// gets the nomination section (complete with comments, etc) and passes this to helper function
	// returns the last suggested hook so the parent method can find article titles
	var hookOutput = document.createElement("ul");
	hookOutput.id = "hook-container";
	output.parentNode.insertBefore(hookOutput, output.nextSibling);
	var bodyHTML = getBody().innerHTML;
	var thisSection;
	if (nextSection !== sections.length - 1) {
		thisSection = bodyHTML.substring(bodyHTML.indexOf(sections[nextSection].innerHTML) + sections[nextSection].innerHTML.length, 
				bodyHTML.indexOf(sections[nextSection+1].innerHTML));
	} else {
		thisSection = bodyHTML.substring(bodyHTML.indexOf(sections[nextSection].innerHTML) + sections[nextSection].innerHTML.length, 
				bodyHTML.indexOf('NewPP limit report'));
	}
	thisSection = thisSection.replace('that,', 'that ').replace('...that ', '... that ');
	if (thisSection.includes("5x expan")) {
		nom5x = true;
	} else {
		nom5x = false;
	}
	return checkHooksHelper(hookOutput, thisSection, 0);
}

function checkHooksHelper(hookOutput, whatsLeft, num) {
	// recursively finds proposed hooks for a nom
	// identifies hooks starting with " ... that " and ending with "?"
	// does not count "... " or "(pictured)" in hook character count
	var hook;
	var questionIndex = whatsLeft.indexOf("?");
	var whatsLeftLowerCase = whatsLeft.toLowerCase();
	while ((whatsLeftLowerCase.indexOf("<a ", questionIndex) > 
			whatsLeftLowerCase.indexOf("</a>", questionIndex)) || 
			((!whatsLeftLowerCase.includes("<a ", questionIndex)) && 
			(whatsLeftLowerCase.includes("</a>", questionIndex))) ||
			(whatsLeftLowerCase.indexOf("<i>", questionIndex) > 
			whatsLeftLowerCase.indexOf("</i>", questionIndex)) || 
			((!whatsLeftLowerCase.includes("<i>", questionIndex)) && 
			(whatsLeftLowerCase.includes("</i>", questionIndex)))) {
		questionIndex = whatsLeft.indexOf("?", questionIndex + 1);
	}
	if (whatsLeft.includes("... that ") && questionIndex !== -1) {
		if (whatsLeft.indexOf("... that ") < questionIndex) {
			hook = whatsLeft.substring(whatsLeft.indexOf("... that ") + 4, 
					questionIndex + 1);
			var hookTemp = document.createElement("div");
			hookTemp.id = "hook-temp";
			hookTemp.innerHTML = "<p>" + hook + "</p>";
			var hookLength = calculateProse(hookTemp, false);
			if (hookTemp.innerHTML.includes("pictured)") || 
					hookTemp.innerHTML.includes("(pictured")) {
				hookLength = hookLength - 10;
			}
			var hookDisp = document.createElement("li");
			hookDisp.id = "hooks-" + num;
			if (num === 0) {
				hookDisp.innerHTML = '<b>Original Hook:</b> ' + escapeHtml(hookLength) + ' characters';
			} else {
				hookDisp.innerHTML = '<b>Alternate Hook ' + escapeHtml(num) +'</b>: ' +
					escapeHtml(hookLength) + ' characters';
			}
			if (hookLength > hookLengthRed) {
				hookDisp.style.cssText = 'background-color:pink';
			} else if (hookLength > hookLengthYellow) {
				hookDisp.style.cssText = 'background-color:yellow';
			}
			hookOutput.appendChild(hookDisp);
			num = num + 1;
		}
		var parsed = whatsLeft.substring(questionIndex + 1, whatsLeft.length - 1);
		var lastHook = checkHooksHelper(hookOutput, parsed, num);
		if (!lastHook && hook) {
			lastHook = hook;
		}
		return lastHook;
	}
	return;
}

function checkTitle(title, output, i) {
	// gets the given title from Wikipedia's server and passes it to scanArticle(),
	// resolving any redirects.
	var promise = api.get({
		format: 'json',
		action: 'parse',
		page: title,
		redirects: true,
		prop: 'text'
	});
	promise.done(function (obj) {
		var ttdykTemp = document.createElement("div");
		ttdykTemp.id = "ttdyk-temp" + i;
		ttdykTemp.innerHTML = obj.parse.text["*"];
		title = obj.parse.title; // Get the new title if we were redirected
		scanArticle(title, output, ttdykTemp);
	});
	promise.fail(function () {
		alert("API error");
	});
}

function clearStats() {
	// if scan results already exist, turn them off and remove highlighting
	if (!onTTDYK) {
		var oldStyle = document.getElementById("dyk-stats-0").className;
		var mainContent = getBody();
		var pList = mainContent.getElementsByTagName("p");
		for (var iPara = 0; iPara < pList.length; iPara++) {
			if (pList[iPara].parentNode === mainContent || pList[iPara].parentNode.parentNode === mainContent) {
				pList[iPara].style.cssText = oldStyle;
			}
		}
	}
	if (document.getElementById("error-disp")) {
		var errorDisp = document.getElementById("error-disp");
		errorDisp.parentNode.removeChild(errorDisp);
	}
	var iStat = 0;
	while (document.getElementById("dyk-stats-" + iStat)) {
		var output = document.getElementById("dyk-stats-" + iStat);
		output.parentNode.removeChild(output);
		iStat++;
	}
	if (document.getElementById("hook-container")) {
		var hookOutput = document.getElementById("hook-container");
		hookOutput.parentNode.removeChild(hookOutput);
	}
	if (document.getElementById("dyk-header")) {
		var header = document.getElementById("dyk-header");
		header.parentNode.removeChild(header);
	}
	if (document.getElementById("dyk-processing")) {
		var processing = document.getElementById("dyk-processing");
		processing.parentNode.removeChild(processing);
	}
}

function calculateProse(doc, visible) {
	// calculates the prose of a given document
	// this function and its helper below are modified versions of
	// the prosesize tool (http://en.wikipedia.org/wiki/User:Dr_pda/prosesize.js)
	var pList = doc.getElementsByTagName("p");
	var prose_size = 0;
	
	var i = 0;
	if (mwConfig.wgAction === 'submit' && visible) i = 1; // Avoid the "Remember that this is only a preview" text
	for (; i < pList.length; i++) {
		if (pList[i].parentNode.parentNode === doc || pList[i].parentNode.parentNode.parentNode.id === getBodyId()) {
			prose_size += getReadable(pList[i], visible);
			if (!onTTDYK && visible) {
				pList[i].style.cssText = 'background-color:yellow';
			}
		}
	}
	return prose_size;
}

function getReadable(id, visible) {
	// helper method for calculateProse()
	var textReadable = 0;
	for (var i = 0; i < id.childNodes.length; i++) {
		if (id.childNodes[i].nodeName === '#text') {
			textReadable += id.childNodes[i].nodeValue.length;
		} else if (id.childNodes[i].className !== 'reference' && !id.childNodes[i].className.includes('emplate') &&
				id.childNodes[i].id !== 'coordinates') {
			textReadable += getReadable(id.childNodes[i], visible);
		} else if (visible) { // if it's an inline maintenance tag (like [citation needed]) or geocoordinates
			if (document.getElementById("dyk-stats-0").className) {
				id.childNodes[i].style.cssText = document.getElementById("dyk-stats-0").className;
			} else {
				id.childNodes[i].style.cssText = 'background-color:white';
			}	
		}
	}
	return textReadable;
}

function checkExpansion(title, output, current) {  
	// finds the start of expansion date (last 500 edits)
	// gets the last 500 unique revision ids for past revisions of the article and passes to helper function
	var promise = getRevisions({
		titles: title,
		rvlimit: 500,
		rvprop: ['ids', 'timestamp'],
		rvdir: 'older'
	});
	promise.done(function (revisions) {
		var expandTemp = document.createElement("div");
		expandTemp.id = "expand-temp";
		checkExpansionHelper(title, current, output, expandTemp, revisions, 0, revisions.length-1, -1);
	});
}

function checkExpansionHelper(title, current, output, expandTemp, revisions, min, max, expandIndex) {
	// helper for expansion check, used recursively
	// searches for start of expansion date using a binary search algorithm
	// assumes the article has been more or less increasing in size all the time
	// if the article length has yoyo-ed, this function won't give accurate results
	var mid = Math.ceil((max + min)/2);
	if ((((max - min) < 2) && (max !== revisions.length - 1 || expandIndex !== -1)) || expandIndex === -2) {
		var expandResult = document.createElement("li");
		expandResult.id = "expand-result";
		output.appendChild(expandResult);
		if (expandIndex < 0) {
			if (revisions.length === 500) {
				expandResult.innerHTML = escapeHtml('Article has not been expanded 5x in the last 500 edits');
			} else {
				expandResult.innerHTML = escapeHtml('Article has not been expanded 5x since it was created');
			}
		} else {
			var date = revisions[expandIndex-1].timestamp;
			expandResult.innerHTML = 'Assuming article is at 5x now, expansion began ' + 
					escapeHtml(expandIndex) + ' edits ago on ' + escapeHtml(toNormalDate(date.substring(0,10)));
			dates[2] = toDateObject(date);
		}
		partsProcessing[3] = true;
		doneProcessing();
		return;
	} else if ((max - min) < 2 && max === revisions.length - 1) {
		expandIndex = -2;
	}
	var promise = api.get({
		format: 'json',
		action: 'parse',
		oldid: revisions[mid].revid,
		prop: 'text'
	});
	promise.done(function (obj) {
		expandTemp.innerHTML = obj.parse.text['*'];
		var prose = calculateProse(expandTemp, false);
		// alert("Prose: " + prose + " 1x: " + current/5 + " Mid: " + mid + " Expand index: " + expandIndex); 
		// use above line to debug the expansion check
		if (prose < (current/5.0)) {
			if ((expandIndex > mid) || (expandIndex < 0)) {
				expandIndex = mid;
			}
			checkExpansionHelper(title, current, output, expandTemp, revisions, min, mid, expandIndex);
		} else {
			checkExpansionHelper(title, current, output, expandTemp, revisions, mid, max, expandIndex);
		}
	});
	promise.fail(function () {
		alert("API error");
		partsProcessing[3] = true;
		doneProcessing();
	});
}

function checkTalk(title, output) { 
	// checks the talk page of the article for DYK, ITN, or stub templates
	if (mwConfig.wgNamespaceNumber !== 2) {
		title = "Talk:" + title;
	} else {
		title = title.replace("User:", "User talk:");
	}
	var promise = getRevisions({
		titles: title,
		rvprop: 'content'
	});
	promise.done(function (revisions) {
		if (revisions && revisions[0]) {
			var talkPage = revisions[0]['*'];
			var result = '';
			var color = '';
			if (talkPage.match(/class\s*=\s*[sS]tub/) && 
					(document.getElementById("stub-alert") === null)) {
				result += 'Article is classified as a stub ';
				color = 'yellow';
			}
			var dyktalkRegexMatches = talkPage.match(/{{\s*[dD](yk|YK\s?)talk[^}]*}}/g);
			if (dyktalkRegexMatches) {
				// if there's a DYK tag, try to find the date of previous appearance
				result += 'Article has appeared on Did You Know before ';
				var dyktalkTag = dyktalkRegexMatches.pop();
				var firstPipeIndex = dyktalkTag.indexOf('|');
				var secondPipeIndex = dyktalkTag.indexOf('|', firstPipeIndex + 1);
				var thirdPipeIndex = dyktalkTag.indexOf('|', secondPipeIndex + 1);
				if (firstPipeIndex !== -1 && secondPipeIndex !== -1) {
					if (thirdPipeIndex === -1) {
						thirdPipeIndex = dyktalkTag.length - 2; // -2 to get rid of the }}
					}
					var monthDate = dyktalkTag.substring(firstPipeIndex + 1, secondPipeIndex);
					var year = dyktalkTag.substring(secondPipeIndex + 1, thirdPipeIndex);
					var featuredDate = new Date(monthDate + " " + year);
					if (featuredDate.toString() !== 'Invalid Date') {
						var month = featuredDate.getMonth() + 1;
						if (month < 10) {
							month = '0' + month;
						}
						var date = featuredDate.getDate();
						if (date < 10) {
							date = '0' + date;
						}
						var dateString = toNormalDate(featuredDate.getFullYear() + '-' + month + '-' + date);
						result = result.substring(0, result.length - 1) + ', on ' + escapeHtml(dateString);
					}
				}
				color = 'pink';
			} else if (talkPage.match(/rticle[ ]?[hH]istory[\s\S]*dykdate\s*=.*?\S/)) {
				result += 'Article has appeared on Did You Know before ';
				color = 'pink';
			}
			if (talkPage.match(/{{\s*[iI]TN(\st|t|T)alk/)) { // {{ITNtalk}}, {{ITN talk}}, {{ITNTalk}}
				result += 'Article has appeared on In The News before ';
				color = 'pink';
			}
			if (result) {
				var talkResult = document.createElement("li");
				talkResult.id = "talk-result";
				output.appendChild(talkResult);
				talkResult.innerHTML = result;
				if (color) {
					talkResult.style["background-color"] = color;
				}
			}
			checkTalkForGoodArticleStatus(talkPage, output);
		}
		partsProcessing[0] = true;
		doneProcessing();
	});
	promise.fail(function () {
		partsProcessing[0] = true;
		doneProcessing();
	});
}

function checkTalkForGoodArticleStatus(talkPage, output) {
	// Test cases:
	// Cathedral of the Immaculate Conception (Moscow) - ArticleHistory, two GANs (last successful), currently a featured article
	// LoveGame - ArticleHistory, one successful GAN, no GARs
	// Paparazzi (Lady Gaga song) - ArticleHistory, one successful GAN, unlisted after a GAR, another successful GAN, no-op GAR
	// Curtis (50 Cent album) - ArticleHistory, one successful GAN, unlisted after a GAR
	// G.U.Y. - ArticleHistory with unconventional formatting
	// Arthur Adams (comics) - ArticleHistory with unconventional formatting
	// Blackburn Firebrand - {{GA}}
	// Tony Hawk's Underground - {{GA}} with confounding {{Game}} tag
	var gaDate = '';
	var gaRegexMatches = talkPage.match(/{{\s*[gG][aA]\s*[|][^}]*}}/g);
	if (gaRegexMatches) {
		// if there's a GA tag, try to find the date of promotion to Good Article
		var gaTag = gaRegexMatches.pop();
		var firstPipeIndex = gaTag.indexOf('|');
		var secondPipeIndex = gaTag.indexOf('|', firstPipeIndex + 1);
		if (firstPipeIndex !== -1) {
			if (secondPipeIndex === -1) {
				secondPipeIndex = gaTag.length - 2; // -2 to get rid of the }}
			}
			gaDate = gaTag.substring(firstPipeIndex + 1, secondPipeIndex);
		}
	} else if (talkPage.match(/rticle[ ]?[hH]istory/)) {
		// check ArticleHistory tag for Good Article status
		
		// grab last GAN action
		// figure out action number
		// given action number, was action result "listed"?
		// if no, stop here - article is not a Good Article
		// if yes, grab the Good Article promotion date from actionXdate
		var ganMatches = talkPage.match(/action[0123456789]+\s*=\s*(gan|GAN)/g);
		if (ganMatches) {
			var lastGanAction = ganMatches.pop();
			var lastGanActionNumber = lastGanAction.substring(6, lastGanAction.indexOf('=')); // remove 'action' and everything at and after the equals sign
			lastGanActionNumber = lastGanActionNumber.trim();
			var ganResultIndex = talkPage.indexOf('action' + lastGanActionNumber +  'result');
			var ganResult = talkPage.substring(talkPage.indexOf('=', ganResultIndex) + 1, talkPage.indexOf('|', ganResultIndex)).trim();
			if (ganResult === 'listed' || ganResult === 'Listed' || ganResult === 'passed' || ganResult === 'Passed') {
				var ganDateIndex = talkPage.indexOf('action' + lastGanActionNumber +  'date');
				gaDate = talkPage.substring(talkPage.indexOf('=', ganDateIndex) + 1, talkPage.indexOf('|', ganDateIndex)).trim();
			}
			
			// then grab last GAR action
			// figure out action number
			// is GAR action number after GAN action number? if yes, carry on
			// given action number, was action result "not listed"?
			// if yes, article is not a Good Article
			var garMatches = talkPage.match(/action[0123456789]+\s*=\s*(gar|GAR)/g);
			if (garMatches) {
				var lastGarAction = garMatches.pop();
				var lastGarActionNumber = lastGarAction.substring(6, lastGarAction.indexOf('=')); // remove 'action' and everything at and after the equals sign
				lastGarActionNumber = lastGarActionNumber.trim();
				if (parseInt(lastGarActionNumber) > parseInt(lastGanActionNumber)) {
					var garResultIndex = talkPage.indexOf('action' + lastGarActionNumber +  'result');
					var garResult = talkPage.substring(talkPage.indexOf('=', garResultIndex) + 1, talkPage.indexOf('|', garResultIndex)).trim();
					if (garResult === 'delisted' || garResult === 'Delisted') {
						gaDate = ''; // Not a Good Article, GAR came after GAN and demoted the article
					}
				}
			}
		}
	}
	
	if (gaDate) {
		if (gaDate.length > 6 && gaDate.indexOf(' (UTC)') === gaDate.length - 6) {
			gaDate = gaDate.substring(0, gaDate.length - 6); // The Boat Race 1997 is not parsing correctly if (UTC) is left in
		}
		if (gaDate.length > 5 && gaDate[2] === ':' && gaDate[5] === ',') {
			gaDate = gaDate.substring(6, gaDate.length); // Chrome not parsing as expected for strings like "17:21, 26 June 2014"
		}
		
		var gaPromotion = document.createElement("li");
		gaPromotion.id = "ga-promotion";
		output.appendChild(gaPromotion);
		var gaPromotedDate = new Date();
		gaPromotedDate.setTime(Date.parse(gaDate));
		
		// ensure the Date object is in the right time zone
		gaPromotedDate = new Date(Date.UTC(gaPromotedDate.getFullYear(), gaPromotedDate.getMonth(), gaPromotedDate.getDate(), gaPromotedDate.getHours(), gaPromotedDate.getMinutes(), gaPromotedDate.getSeconds()));
		
		dates[3] = gaPromotedDate;
		gaPromotion.innerHTML = 'Article was promoted to Good Article status on ' +
			escapeHtml(toNormalDate(gaPromotedDate.toISOString()));
	}
}

function getRevisions(options) {
	// Returns a jQuery promise with an array of a title's revisions.
	// The first parameter is an options object accepting the following API fields:
	// - titles
	// - rvlimit
	// - rvprop
	// - rvdir
	options = options || {};
	return api.get({
		format: 'json',
		action: 'query',
		prop: 'revisions',
		titles: options.titles,
		rvlimit: options.rvlimit,
		rvprop: options.rvprop,
		rvdir: options.rvdir,
		indexpageids: true
	}).then(
		// On success
		function (obj) {
			var pageId = obj.query.pageids[0];
			return obj.query.pages[pageId].revisions;
		},
		// On failure
		function (err) {
			alert("API error");
			return err;
		}
	);
}

function getFirstRevision(title, output) {
	// finds the creator of the article, and the date created
	// also checks if the article was created as a redirect, finds non-redirect date if so

	var created = document.createElement("li");
	created.id = "creation-info";
	output.appendChild(created);
		
	var promise = getRevisions({
		titles: title,
		rvlimit: 4,
		rvprop: ['timestamp', 'user', 'content'],
		rvdir: 'newer'
	});
	promise.done(function (revisions) {
		var user = revisions[0].user;
		var timestamp = revisions[0].timestamp;
		created.innerHTML='<b>Article created </b> by ' + escapeHtml(user) + 
				' on ' + escapeHtml(toNormalDate(timestamp.substring(0,10)));
		dates[0] = toDateObject(timestamp);
		for (var i = 0; i < revisions.length; i++) {
			var content = revisions[i]['*'];
			var isRedirect = content.replace(' ', '').replace(':', '').toUpperCase().includes('#REDIRECT[[');
			if (isRedirect && i === 0) {
				created.innerHTML = created.innerHTML + ' as a redirect';
			} else if (!isRedirect) {
				if (i !== 0) {
					var unRedirect = document.createElement("li");
					unRedirect.id = "expanded-from-redirect";
					output.appendChild(unRedirect);
					var urUser = revisions[i].user;
					var urTimestamp = revisions[i].timestamp;
					unRedirect.innerHTML = 'Article became a non-redirect on ' + 
							escapeHtml(toNormalDate(urTimestamp.substring(0,10))) +
							' by ' + escapeHtml(urUser);
					dates[0] = toDateObject(urTimestamp);
				}
				break;
			}
		}
		partsProcessing[1] = true;
		doneProcessing();
	});
	promise.fail(function () {
		partsProcessing[1] = true;
		doneProcessing();
	});
}

function checkMove(title, output) { 
	//checks the last 100 edits of an article for a move from userspace or AfC to current location
	var promise = getRevisions({
		titles: title,
		rvlimit: 100,
		rvprop: ['flags', 'user', 'timestamp', 'comment'],
		rvdir: 'older',
	});
	promise.done(function (revisions) {
		for (var i = 0; i < revisions.length; i++) {
			var comment = revisions[i].comment;
			var userName = revisions[i].user;
			if ((revisions[i].minor === "") && 
					comment.match(/moved (page )?((\[\[User:)|(\[\[Draft:)|(\[\[Wikipedia talk:Articles for creation\/))[\s\S]*to \[\[/)) {
				var movedFrom = comment.substring(comment.indexOf("[[") + 2, comment.indexOf("to [[") - 3);
				var date = revisions[i].timestamp;
				var moved = document.createElement("li");
				moved.id = "moved-userspace";
				output.appendChild(moved);
				moved.innerHTML = '<b>Article moved</b> from ' + escapeHtml(movedFrom) + 
						' on ' + escapeHtml(toNormalDate(date.substring(0,10)));
				dates[1] = toDateObject(date);
				break;
			}
		}
		partsProcessing[2] = true;
		doneProcessing();
	});
	promise.fail(function () {
		partsProcessing[2] = true;
		doneProcessing();
	});
}

function doneProcessing() {
	// checks if all parts are done processing
	// if they are, the dates of creation and expansion are checked for within 10 days (rounded down, in nominator's favor)
	// then the next title (for multiple article noms) is processed (required to combat asynchronous threads)
	// if there are no more titles left (or not on T:TDYK), the processing message is removed
	var titleComplete = true;
	for (var i = 0; i < partsProcessing.length; i++) {
		if (!partsProcessing[i]) {
			titleComplete = false;
			break;
		}
	}
	if (document.getElementById("dyk-processing") && titleComplete) {
		var curDate = new Date();
		var winner = new Date();
		if (dates[1]) {
			winner = dates[1]; 
		} else {
			winner = dates[0];
		}
		if (dates[2] > winner) {
			winner = dates[2];
		}
		if (dates[3] > winner) {
			winner = dates[3];
		}
		var dateDifference = Math.floor((curDate.getTime() - winner.getTime())/(1000*60*60*24));
		if (dateDifference > 10) {
			var output = document.getElementById("dyk-stats-" + currentTitle);
			var notRecent = document.createElement("li");
			notRecent.id = "not-recent";
			output.appendChild(notRecent);
			if (!onTTDYK || (check5xNoms === "always") || (check5xNoms === "ifnom5x" && nom5x)) {
				notRecent.innerHTML = "Article has not been created or expanded 5x or promoted to Good Article within the past 10 days (" + 
						escapeHtml(dateDifference) + " days)" + " <small>DYKcheck does not account for previous versions with " +
						'<a href="//en.wikipedia.org/wiki/Wikipedia:Split">splits</a> or ' +
						'<a href="//en.wikipedia.org/wiki/Wikipedia:Copyright_violations">copyright violations</a>.</small>';
			} else {
				notRecent.innerHTML = "Article was not created within the past 10 days (" + escapeHtml(dateDifference) + " days)";
			}
			notRecent.style.cssText = 'background-color:pink';
		}
		if (onTTDYK && currentTitle < (articleTitles.length - 1)) {
			currentTitle++;
			checkTitle(articleTitles[currentTitle], 
					document.getElementById("dyk-stats-" + (currentTitle)), currentTitle);
		} else {
			var processing = document.getElementById("dyk-processing");
			processing.parentNode.removeChild(processing);
		}
	}
}

// taken from the prosesize tool (http://en.wikipedia.org/wiki/User:Dr_pda/prosesize.js)
function getBodyId() {
	var contentName;
	if (mwConfig.skin === 'monobook' || mwConfig.skin === 'chick' || mwConfig.skin === 'mymwConfig.skin' || mwConfig.skin === 'simple') {
		contentName = 'bodyContent';
	} else if (mwConfig.skin === 'modern') {
		contentName = 'mw_contentholder';
	} else if (mwConfig.skin === 'standard' || mwConfig.skin === 'cologneblue' || mwConfig.skin === 'nostalgia') {
		contentName = 'article';
	} else {
		// fallback case; the above covers all currently existing skins
		contentName = 'bodyContent';
	}
	// Same for all skins if previewing page
	if (mwConfig.wgAction === 'submit') contentName = 'wikiPreview';
	return contentName;
}

function getBody() { 
	// gets the HTML body of the page
	// taken from the prosesize tool (http://en.wikipedia.org/wiki/User:Dr_pda/prosesize.js)
	return document.getElementById(getBodyId());
}

function getFirstNom() {
	var firstNom = 0;
	
	// Find the first "Articles created/expanded on ..." h3 section
	var elementIterator = sections[firstNom].previousSibling;
	while (elementIterator.nodeName.toLowerCase() !== "h3") {
		elementIterator = elementIterator.previousSibling;
	}
	while (!(elementIterator.nodeName.toLowerCase() === "h3" && 
			elementIterator.innerHTML.includes("Articles created/expanded on"))) {
		if (elementIterator.nodeName.toLowerCase() === "h4") {
			firstNom++;
		}
		elementIterator = elementIterator.nextSibling;
	}
	return firstNom;
}

function createHeaderAndProcessing(output) { 
	// makes the header above the scan results
	var header = document.createElement("span");
	header.id = "dyk-header";
	header.innerHTML = '<br /><b>DYK eligibility scan results: <small><i>(See <a href="//en.wikipedia.org/wiki/' + 
			'User:Shubinator/DYKcheck">here</a> for details.)</i></small></b>';
	output.parentNode.insertBefore(header,output);
	var processing = document.createElement("span");
	processing.id = "dyk-processing";
	processing.innerHTML = '<br /><b><font color="crimson"> Processing... </font></b>';
	output.parentNode.insertBefore(processing, header);
}

function toNormalDate(utc) { 
	// converts the date part of a Wikipedia timestamp to a readable date
	var months = new Array("blank","January","February", "March", "April", "May", "June", 
			"July", "August", "September", "October", "November", "December");
	if (dateFormat === "british") {
		return (utc.substring(8,10) * 1) + ' ' + months[utc.substring(5,7) * 1] + ' ' + utc.substring(0,4);
	} else {
		return months[utc.substring(5,7) * 1] + ' ' + (utc.substring(8,10) * 1) + ', ' + utc.substring(0,4);
	}
}

function toDateObject(timestamp) { 
	// converts a Wikipedia timestamp to a Javascript Date object
	var date = new Date();
	date.setUTCFullYear(timestamp.substring(0,4), timestamp.substring(5,7) - 1, timestamp.substring(8,10));
	date.setUTCHours(timestamp.substring(11,13), timestamp.substring(14,16), timestamp.substring(17,19));
	return date;
}

function fixSidebar() { // part of the code to fix the sidebar; the rest is below the addToolbarPortletLink function
	// this function is only necessary for the monobook skin
	var content = document.getElementById("column-content");    // Find the main content column

	var footer = document.getElementById("footer");  // Find the footer
	footer.parentNode.removeChild(footer);    // Remove the footer from the global wrapper
	content.appendChild(footer);    // Place footer at the end of the content column;

	var tabs = document.getElementById("p-cactions");   // Find the top tab list
	tabs.parentNode.removeChild(tabs);    // Remove the tab list from the side column
	content.insertBefore(tabs, content.lastChild);    // Place tab list in the content column

	var personal = document.getElementById("p-personal");   // Find the personal links list
	personal.parentNode.removeChild(personal);    // Remove the personal links list from the side column
	content.insertBefore(personal, content.lastChild);    // Place personal links list in the content column
}

window.dykCheck = function () { 
	// this function for casual use and anons
	if (((mwConfig.wgAction === 'view' || mwConfig.wgAction === 'submit' || mwConfig.wgAction === 'purge') && 
			(mwConfig.wgNamespaceNumber === 0 || mwConfig.wgNamespaceNumber === 2)) || unlock) {
		checkDocument();
	} else if (mwConfig.wgPageName === 'Template_talk:Did_you_know') {
		checkTTDYK();
	}
};

function addToolbarPortletLink(func, tooltip) {
	var link = mw.util.addPortletLink(
		'p-tb',
		'#',
		'DYK check',
		't-dyk-check',
		tooltip
	);
	$( link ).click( function (e) {
		e.preventDefault();
		func();
	});
}

// Add toolbar portlet links
if (unlock || (
		(mwConfig.wgAction === 'view' || mwConfig.wgAction === 'submit' || mwConfig.wgAction === 'purge') && 
		(mwConfig.wgNamespaceNumber === 0 || mwConfig.wgNamespaceNumber === 2)
)) {
	addToolbarPortletLink(checkDocument, 'Check if this article qualifies for DYK');
} else if (mwConfig.wgPageName === 'Template_talk:Did_you_know') {
	addToolbarPortletLink(checkTTDYK, 'Check DYK nominations for eligibility');
}

// Fix the sidebar
if (mwConfig.wgUserName && mwConfig.skin === 'monobook' && (
		fixedSidebar === "always" ||
		fixedSidebar === "onttydk" && mwConfig.wgPageName === 'Template_talk:Did_you_know'
)) {
	fixSidebar();
}

// The code below for the fixed sidebar is a blend of two sources:
//		http://meta.wikimedia.org/wiki/Help:User_style/floating_quickbar 
// 		http://en.wikipedia.org/wiki/User:Omegatron/monobook.js/floatingSidebar.js
// Very little of the code below was written by me (Shubinator)

// This CSS should be hidden from older versions of IE using javascript instead of the attribute selector?

// Include style sheet inline so that script is self-contained:
if (mwConfig.wgUserName && (
		fixedSidebar === "always" ||
		fixedSidebar === "onttydk" && mwConfig.wgPageName === 'Template_talk:Did_you_know'
)) {
	var head = document.getElementsByTagName("head")[0];
	var style = document.createElement('style');
	style.type = 'text/css';
	var sidebarDivHidden;
	var sidebarDiv;
	var langBody;
	if (mwConfig.skin === 'vector') { // default skin  (as of May 2010)
		sidebarDivHidden = 'div#mw-panel';
		sidebarDiv = 'div#mw-panel';
		langBody = '#p-lang .body';
	} else { // monobook, modern, and simple skins
		if (mwConfig.skin === 'modern') {
			sidebarDivHidden = 'div[id=mw_portlets]';
		} else if (mwConfig.skin === 'simple') {
			sidebarDivHidden = '#column-one';
		} else { // monobook skin
			sidebarDivHidden = 'div[id=column-one]'; /* Using the attribute selector hides this from IE */
		}
		sidebarDiv = '#column-one';
		langBody = '#p-lang .pBody';
	}
	var cssText = "   /* Fix the sidebar's position while you scroll */             "+
	    sidebarDivHidden + ' {                                                      '+
	'       position: fixed;                                                        ';
	if (mwConfig.skin === 'vector') { // force the sidebar to the upper left; only necessary in some skins
	    cssText += 'left: 0px;                                                      '+
	    '   top: 0px;                                                               ';
	} else if (mwConfig.skin === 'monobook') {
	    cssText += 'left: 0px;                                                      '+
	    '   top: -160px;                                                            ';
	}
	cssText += 'height: 100%;   /* If you shrink the browser too small, the     */  '+
	'       overflow: auto;     /* side column will become scrollable, so stuff */  '+
	'       z-index: 2;         /* is always accessible, albeit ugly            */  '+
	'   }                                                                           '+
	'                                                                               '+
	'   #p-logo {               /* Make logo inline with other divs             */  '+
	'       position:static;                                                        '+
	'   }                                                                           '+
	'                                                                               '+
	    sidebarDiv       + ' {  /* Sidebar column start at the top screen edge  */  '+
	'       padding-top: 0;                                                         '+
	'   }                                                                           '+
	'                                                                               '+
	    langBody + 	  ' ul{      /* Sets the language box to a fixed height and  */ '+
	'       height: 6em;        /* scrollable if too long to fit on screen      */  '+
	'       overflow: auto;                                                         '+
	'   }                                                                           '+
	'                                                                               '+
	'   /* Fix the background image, too, so it looks nice as you scroll */         '+
	'   body {                                                                      '+
	'       background-attachment: fixed;                                           '+
	'   }                                                                           '+
	'                                                                               '+
	"   /* Fix the footer so it looks nice and doesn't overlap the sidebar */       "+
	'   #footer {                                                                   '+
	'       margin-left: 13.6em;                                                    '+
	'       border-left: solid 1px rgb(250, 189, 35);                               '+
	'       -moz-border-radius-topleft: 1em;                                        '+
	'       -moz-border-radius-bottomleft: 1em;                                     '+
	'   }                                                                           ';
	if (mwConfig.skin === 'monobook') {
	    cssText += 	'   /* Keep personal links at the top right */                  '+
	'   #p-personal {                                                               '+
	'       width:100%;                                                             '+
	'       white-space:nowrap;                                                     '+
	'       padding:0 0 0 0;                                                        '+
	'       margin:0;                                                               '+
	'       position:absolute;                                                      '+
	'       left:0px;                                                               '+
	'       top:0px;                                                                '+
	'       z-index: 0;                                                             '+
	'       border: none;                                                           '+
	'       background: none;                                                       '+
	'       overflow: visible;                                                      '+
	'       line-height: 1.2em;                                                     '+
	'   }                                                                           '+
	'                                                                               '+
	'   #p-personal h5 {                                                            '+
	'       display:none;                                                           '+
	'   }                                                                           '+
	'   #p-personal .portlet,                                                       '+
	'   #p-personal .pBody {                                                        '+
	'       padding:0;                                                              '+
	'       margin:0;                                                               '+
	'       border: none;                                                           '+
	'       z-index:0;                                                              '+
	'       overflow: visible;                                                      '+
	'       background: none;                                                       '+
	'   }                                                                           '+
	'   /* this is the ul contained in the portlet */                               '+
	'   #p-personal ul {                                                            '+
	'       border: none;                                                           '+
	'       line-height: 1.4em;                                                     '+
	'       color: #2f6fab;                                                         '+
	'       padding: 0em 2em 0 3em;                                                 '+
	'       margin: 0;                                                              '+
	'       text-align: right;                                                      '+
	'       text-transform: lowercase;                                              '+
	'       list-style: none;                                                       '+
	'       z-index:0;                                                              '+
	'       background: none;                                                       '+
	'   }                                                                           '+
	'   #p-personal li {                                                            '+
	'       z-index:0;                                                              '+
	'       border:none;                                                            '+
	'       padding:0;                                                              '+
	'       display: inline;                                                        '+
	'       color: #2f6fab;                                                         '+
	'       margin-left: 1em;                                                       '+
	'       line-height: 1.2em;                                                     '+
	'       background: none;                                                       '+
	'   }                                                                           '+
	'   #p-personal li a {                                                          '+
	'       text-decoration: none;                                                  '+
	'       color: #005896;                                                         '+
	'       padding-bottom: 0.2em;                                                  '+
	'       background: none;                                                       '+
	'   }                                                                           '+
	'   #p-personal li a:hover {                                                    '+
	'       background-color: White;                                                '+
	'       padding-bottom: 0.2em;                                                  '+
	'       text-decoration: none;                                                  '+
	'   }                                                                           '+
	'   /* Keep the small user figure left of your user name */                     '+
	'   li#pt-userpage,                                                             '+
	'   li#pt-anonuserpage,                                                         '+
	'   li#pt-login {                                                               '+
	'       background: url(/skins-1.5/monobook/user.gif) top left no-repeat;       '+
	'       padding-left: 20px;                                                     '+
	'       text-transform: none;                                                   '+
	'   }                                                                           '+
	'                                                                               ';
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});